INSIZE Outside Micrometer Set 150-300mm Features include... 150-300mm Measuring Range 0.01mm Graduations Carbide Measuring Faces 0.256" Spindle Diameter Ratchet Stop Spindle Lock Furnished in fitted Case Included in this set... 150-175mm Micrometer with Standard 175-200mm Micrometer with Standard 200-225mm Micrometer with Standard 225-250mm Micrometer with Standard 250-275mm Micrometer with Standard 275-300mm Micrometer with Standard